<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
            </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="roleList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',index1===0?'bdtop':'','vcenter']" v-for="(item1,index1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 渲染二级权限 -->
                            <el-row :class="[index2===0?'':'bdtop','vcenter']" v-for="(item2,index2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row> 
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit"
                        @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete"
                        @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting"
                        @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
        title="添加用户"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed">
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="addForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addForm.roleDesc"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog
        title="修改角色"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed">
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
            <el-form-item label="角色名称">
                <el-input v-model="editForm.roleName" disabled></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="editForm.roleDesc"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoleInfo">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightsList" :props="treeProps" 
            show-checkbox node-key="id" default-expand-all 
            :default-checked-keys="defKeys"
            ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data(){
        return{
            /* 所有角色列表数据 */
            roleList:[],
            addDialogVisible:false,
            editDialogVisible:false,
            setRightDialogVisible:false,
            addForm:{
                roleName:'',
                roleDesc:'',
            },
            addFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',trigger:'blur'},
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger:'blur'},
                ]
            },
            editForm:{},
            editFormRules:{
                roleDesc:[
                    {required:false,trigger:'blur'}
                ]
            },
            /* 所有权限的数据 */
            rightsList:[],
            /* 树形控件的属性绑定对象 */
            treeProps:{
                label:'authName',
                children:'children'
            },
            defKeys:[],
            /* 当前选中的角色Id */
            roleId:''

        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')

            if(res.meta.status!=200)
                return this.$message.error("获取角色列表失败！")

            this.roleList=res.data
            console.log(this.roleList)
        },
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        addRole(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid)  return
                const {data:res} = await this.$http.post('roles',this.addForm)
                if(res.meta.status!==201)
                    this.$message.error("添加角色失败！")
                this.$message.success("添加用户成功")
                this.addDialogVisible=false;
                this.getRolesList()
            })
        },

        async removeRoleById(id){
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)
            /* 如果用户确认，则返回字符串confirm
            如果用户取消，则返回字符串cancel
            */
            if(confirmResult!='confirm'){
                return this.$message.info('已取消删除')
            }
            const {data:res}= await this.$http.delete('roles/'+id)

            if(res.meta.status!=200)
            return this.$message.error('删除角色失败！')

            this.$message.success("删除角色成功！")
            this.getRolesList()
        },

        async showEditDialog(id){
            const {data:res} = await this.$http.get('roles/'+id)
            if(res.meta.status!==200)
                return this.$message.error("查询角色信息失败！")
            this.editForm=res.data
            this.editDialogVisible=true;
        },
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        editRoleInfo(){
            this.$refs.editFormRef.validate(async valid=>{
                if(!valid)  return
                const {data:res} = await this.$http.put('roles/'+this.editForm.roleId,{
                    roleName:this.editForm.roleName,
                    roleDesc:this.editForm.roleDesc
                })
                console.log(this.editForm)
                if(res.meta.status!==200)
                    return this.$message.error("更新角色信息失败！")
                this.editDialogVisible=false;
                this.getRolesList();
                this.$message.success("更新角色信息成功")
            })
        },

        /* 删除权限 */
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)

            if(confirmResult!=='confirm')
                return this.$message.info('取消删除')
            
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status!=200)
                return this.$message.error('删除权限失败！')

            /* this.getRolesList() */
            role.children=res.data
        },

        /* 展示分配权限的对话框 */
        async showSetRightDialog(role){
            this.roleId=role.id
            /* 获取所有权限的数据 */
            const {data:res} = await this.$http.get('rights/tree')

            if(res.meta.status!==200)
                return this.$message.error('获取权限数据失败！')

            this.rightsList=res.data
            console.log(this.rightsList)
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible=true
        },
        /* 通过提柜的形式获取角色下所有三级权限，保存到defKeys中 */
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>this.getLeafKeys(item,arr))
        },
        setRightDialogClosed(){
            this.defKeys=[]
        },
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr=keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

            if(res.meta.status!==200)
                return this.$message.error("分配权限失败！")
            this.$message.success("分配权限成功！")
            this.getRolesList()
            this.setRightDialogVisible=false
        }
    }
}
</script>

<style>
.el-tag{
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter{
    display: flex;
    align-items: center;
}
</style>